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Resonant inelastic X-ray scattering in electronically quasi-zero-dimensional CuB$$_2$$O$$_4$$

電子的擬0次元CuB$$_2$$O$$_4$$の共鳴非弾性X線散乱

Hancock, J. N.*; Chabot-Couture, G.*; Li, Y.*; Petrakovski$u{i}$, G. A.*; 石井 賢司; Jarrige, I.; 水木 純一郎; Devereaux, T. P.*; Greven, M.*

Hancock, J. N.*; Chabot-Couture, G.*; Li, Y.*; Petrakovski$u{i}$, G. A.*; Ishii, Kenji; Jarrige, I.; Mizuki, Junichiro; Devereaux, T. P.*; Greven, M.*

We present a resonant inelastic scattering (RIXS) study using of CuB$$_2$$O$$_4$$, which contains a lattice of CuO$$_4$$ plaquettes electronically isolated by B$$^{+3}$$ ions. The observed Cu $$K$$-edge spectra show a small number of well-separated features, and the simple electronic structure of CuB$$_2$$O$$_4$$ allows us to explore RIXS phenomenology. We find a low-energy feature that cannot be attributed to the same charge-transfer excitation discussed in other cuprates and is likely a $$d to d$$ transition thought to be forbidden under common considerations of $$K$$-edge RIXS.

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パーセンタイル:65.27

分野:Materials Science, Multidisciplinary

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